<div id="map_box">
    <div id="map_container"></div>
</div>
<style>
#map_box {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    /*padding-top: 48px;*/
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}

#map_container {
    width: 100%;
    height: 100%;
}
</style>

